Defect-Induced Epitaxial Growth for Efficient Solar Hydrogen Production

Kan Zhang, Jung Kyu Kim, Bumsu Park, Shifeng Qian, Bingjun Jin, Xiaowei Sheng, Haibo Zeng, Hyunjung Shin, Sang Ho Oh, Chang Lyoul Lee, Jong Hyeok Park

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

Epitaxial growth suffers from the mismatches in lattice and dangling bonds arising from different crystal structures or unit cell parameters. Here, we demonstrate the epitaxial growth of 2D MoS2 ribbon on 1D CdS nanowires (NWs) via surface and subsurface defects. The interstitial Cd0 in the (1210) crystal plane of the [0001]-oriented CdS NWs are found to serve as nucleation sites for interatomically bonded [001]-oriented MoS2, where the perfect lattice match (∼99.7%) between the (1011) plane of CdS and the (002)-faceted in-plane MoS2 result in coaxial MoS2 ribbon/CdS NWs heterojunction. The coaxial but heterotropic epitaxial MoS2 ribbon on the surface of CdS NWs induces delocalized interface states that facilitate charge transport and the reduced surface state. A less than 5-fold ribbon width of MoS2 as hydrogen evolution cocatalyst exhibits a ∼10-fold H2 evolution enhancement than state of the art Pt in an acidic electrolyte, and apparent quantum yields of 79.7% at 420 nm, 53.1% at 450 nm, and 9.67% at 520 nm, respectively.

Original languageEnglish
Pages (from-to)6676-6683
Number of pages8
JournalNano letters
Volume17
Issue number11
DOIs
Publication statusPublished - 2017 Nov 8

Fingerprint

hydrogen production
Hydrogen production
Epitaxial growth
ribbons
Nanowires
nanowires
Defects
defects
Dangling bonds
Interface states
Surface states
Quantum yield
surface defects
Crystal lattices
Electrolytes
Heterojunctions
Charge transfer
heterojunctions
Hydrogen
interstitials

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

Zhang, Kan ; Kim, Jung Kyu ; Park, Bumsu ; Qian, Shifeng ; Jin, Bingjun ; Sheng, Xiaowei ; Zeng, Haibo ; Shin, Hyunjung ; Oh, Sang Ho ; Lee, Chang Lyoul ; Park, Jong Hyeok. / Defect-Induced Epitaxial Growth for Efficient Solar Hydrogen Production. In: Nano letters. 2017 ; Vol. 17, No. 11. pp. 6676-6683.
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Zhang, K, Kim, JK, Park, B, Qian, S, Jin, B, Sheng, X, Zeng, H, Shin, H, Oh, SH, Lee, CL & Park, JH 2017, 'Defect-Induced Epitaxial Growth for Efficient Solar Hydrogen Production', Nano letters, vol. 17, no. 11, pp. 6676-6683. https://doi.org/10.1021/acs.nanolett.7b02622

Defect-Induced Epitaxial Growth for Efficient Solar Hydrogen Production. / Zhang, Kan; Kim, Jung Kyu; Park, Bumsu; Qian, Shifeng; Jin, Bingjun; Sheng, Xiaowei; Zeng, Haibo; Shin, Hyunjung; Oh, Sang Ho; Lee, Chang Lyoul; Park, Jong Hyeok.

In: Nano letters, Vol. 17, No. 11, 08.11.2017, p. 6676-6683.

Research output: Contribution to journalArticle

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Zhang K, Kim JK, Park B, Qian S, Jin B, Sheng X et al. Defect-Induced Epitaxial Growth for Efficient Solar Hydrogen Production. Nano letters. 2017 Nov 8;17(11):6676-6683. https://doi.org/10.1021/acs.nanolett.7b02622